In summary, a new fast and sensitive reversed-phase liquid
chromatography method for separation of HQ, PO and six preservatives
was developed. After optimization of the sample preparation
conditions and the composition of the mobile phase, pH and buffer,
baseline separation of all of the studied components was obtained
in less than 10 min. In addition, this method showed good results in
terms of linearity, accuracy, repeatability, and limits of detection.
The HPLC method can be applied to determine residue of the eight
studied components in cosmetics and to analyze residues of these
components in food, drug or environmental samples.